feat(editor): preview dml changes as readonly select
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//! 「预览变更」SQL 生成：把 SQL 编辑器里的一条 DML（UPDATE / INSERT / DELETE）
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//! 改写成一条只读 SELECT，用于在执行前干跑预览受影响的数据。
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//!
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//! 思路：不手工重建 sqlparser AST，而是复用 sqlparser 对表达式 / 表 / WHERE 的
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//! 方言正确渲染（`Display` round-trip），只在外层做字符串装配：
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//! UPDATE t SET a = 123 WHERE id = 1
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//! → SELECT *, 123 AS "a (new)" FROM t WHERE id = 1
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//! `SELECT *` 展开受影响行全部当前值，新值列（别名后缀 ` (new)`）追加在末尾；
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//! SET 表达式直接搬运（在行上下文中按旧值求值即得新值，`SET a = a + 1` 也能算对）。
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//! 注意：SET / VALUES 表达式会在预览 SELECT 中重新求值，带副作用的表达式
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//! （推进序列、volatile 函数）在预览中同样生效，非确定性函数的预览值可能与实际执行不同。
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//!
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//! 无法安全改写的语句返回 Err（错误信息为英文，前端直接以 toast 展示，仍可正常执行原语句）。
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use sqlparser::ast::{AssignmentTarget, Expr, Ident, ObjectNamePart, SetExpr, Statement, TableWithJoins};
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use sqlparser::dialect::{
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ClickHouseDialect, DuckDbDialect, GenericDialect, MsSqlDialect, MySqlDialect, PostgreSqlDialect, SQLiteDialect,
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SparkSqlDialect,
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};
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use sqlparser::parser::Parser;
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#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct DmlChangePreviewSqlOptions {
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/// 用户写的一条 DML 语句（通常是当前语句）。
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pub sql: String,
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/// 连接类型（决定解析方言 / 默认标识符引号）。
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pub database_type: Option<String>,
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/// 连接的标识符引号字符（如 `"`、`` ` ``、`[`），None 时按方言回退。
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pub identifier_quote: Option<String>,
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/// 目标表的列（按 ordinal 顺序）。提供且为单表 UPDATE 时，新值列紧跟其原值列。
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#[serde(default, skip_serializing_if = "Option::is_none")]
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pub columns: Option<Vec<String>>,
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}
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#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct DmlChangePreviewTableRef {
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pub catalog: Option<String>,
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pub database: Option<String>,
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pub schema: Option<String>,
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pub table: Option<String>,
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}
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#[derive(Debug, Clone, serde::Serialize)]
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#[serde(rename_all = "camelCase")]
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pub struct DmlChangePreviewSqlResult {
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/// 生成的只读 SELECT。
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pub sql: String,
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/// 语句类型：update / insert / delete。
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pub operation: String,
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/// 是否有「新值」列（仅 UPDATE 有，INSERT 的列本身即新值）。
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pub has_new_value_columns: bool,
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/// 语句目标表引用（供前端拉取列元数据以交错展示新值列）。
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pub tables: Vec<DmlChangePreviewTableRef>,
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}
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fn normalize_dialect(database_type: Option<&str>) -> &'static str {
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match database_type.unwrap_or("generic").to_ascii_lowercase().as_str() {
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"postgres" | "postgresql" | "redshift" | "opengauss" | "gaussdb" | "highgo" | "uxdb" | "questdb" => "postgres",
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"mysql" | "mariadb" | "doris" | "starrocks" | "manticoresearch" | "oceanbase" | "tidb" => "mysql",
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"sqlite" => "sqlite",
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"sqlserver" | "mssql" => "sqlserver",
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"clickhouse" => "clickhouse",
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"duckdb" => "duckdb",
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"spark" | "sparksql" => "spark",
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_ => "generic",
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}
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}
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fn parse_statements(sql: &str, dialect_key: &str) -> Result<Vec<Statement>, String> {
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match dialect_key {
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"postgres" => Parser::parse_sql(&PostgreSqlDialect {}, sql),
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"mysql" => Parser::parse_sql(&MySqlDialect {}, sql),
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"sqlite" => Parser::parse_sql(&SQLiteDialect {}, sql),
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"sqlserver" => Parser::parse_sql(&MsSqlDialect {}, sql),
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"clickhouse" => Parser::parse_sql(&ClickHouseDialect {}, sql),
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"duckdb" => Parser::parse_sql(&DuckDbDialect {}, sql),
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"spark" => Parser::parse_sql(&SparkSqlDialect {}, sql),
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_ => Parser::parse_sql(&GenericDialect {}, sql),
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}
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.map_err(|error| format!("Failed to parse the statement: {error}"))
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}
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fn quote_identifier(name: &str, quote: Option<&str>, dialect_key: &str) -> String {
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if let Some(value) = quote {
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if value == "`" || value == "\"" || value == "'" {
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return format!("{value}{name}{value}");
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}
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if value == "[" {
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return format!("[{name}]");
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}
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}
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match dialect_key {
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"mysql" => format!("`{name}`"),
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_ => format!("\"{name}\""),
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}
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}
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/// 从赋值目标里取出列名（`t.a` → `a`）。
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fn assignment_target_column(target: &AssignmentTarget) -> Option<&Ident> {
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match target {
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AssignmentTarget::ColumnName(object_name) => object_name.0.last().and_then(ObjectNamePart::as_ident),
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AssignmentTarget::Tuple(_) => None,
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}
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}
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fn unsupported(reason: &str) -> String {
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format!("Preview is not supported: {reason}")
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}
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/// UPDATE → SELECT <列交错展开> FROM … WHERE …
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///
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/// 提供目标表列清单且为单表时，按「原列, 原列 (new)」逐列交错展开，使新值列紧跟
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/// 其原值列；否则退化为 `SELECT *, <SET 表达式> AS "列 (new)", …`（追加在末尾）。
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fn build_update_preview(
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update: &sqlparser::ast::Update,
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dialect_key: &str,
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quote: Option<&str>,
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columns: Option<&[String]>,
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) -> Result<String, String> {
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// 收集 SET 新值表达式：同列重复赋值取最后一次，但保持首次出现的列序。
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#[derive(Clone)]
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struct SetItem {
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column: String,
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expr: String,
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}
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let mut set_items: Vec<SetItem> = Vec::new();
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let mut set_order: Vec<String> = Vec::new(); // 小写列名 → 顺序
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for assignment in &update.assignments {
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let Some(column) = assignment_target_column(&assignment.target) else {
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return Err(unsupported("UPDATE assignment target is not a single column"));
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};
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let column_name = column.value.clone();
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let key = column_name.to_lowercase();
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if let Some(position) = set_order.iter().position(|existing| *existing == key) {
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set_order.remove(position);
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set_items.remove(position);
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}
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set_order.push(key);
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set_items.push(SetItem { column: column_name, expr: assignment.value.to_string() });
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}
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// Postgres `UPDATE … FROM …`：同一目标行可能匹配多行来源，真实 UPDATE 只更新一次，
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// 而改写出的 SELECT 会把该行显示多次（跨连接重复计数），直接拒绝预览。
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if let Some(from_kind) = &update.from {
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let extra_count = match from_kind {
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sqlparser::ast::UpdateTableFromKind::BeforeSet(list)
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| sqlparser::ast::UpdateTableFromKind::AfterSet(list) => list.len(),
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};
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if extra_count > 0 {
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return Err(unsupported("UPDATE ... FROM"));
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}
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}
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let from_sql = update.table.to_string();
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let render_new_value = |item: &SetItem| -> String {
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format!("{} AS {}", item.expr, quote_identifier(&format!("{} (new)", item.column), quote, dialect_key))
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};
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let append_items: Vec<String> = set_items.iter().map(render_new_value).collect();
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// 单表 + 提供了列清单 → 交错展开（新值列紧跟原值列）。
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let single_table = update.table.joins.is_empty() && update.from.is_none();
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let select_items = if single_table {
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match columns {
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Some(column_list) if !column_list.is_empty() => {
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let mut projection: Vec<String> = Vec::new();
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let mut placed: Vec<String> = Vec::new();
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for column in column_list {
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projection.push(quote_identifier(column, quote, dialect_key));
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let key = column.to_lowercase();
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if let Some(position) = set_order.iter().position(|existing| *existing == key) {
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projection.push(render_new_value(&set_items[position]));
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placed.push(key);
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}
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}
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// SET 列未在列清单中（大小写差异 / 虚拟列等）追加到末尾，避免遗漏。
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for (index, key) in set_order.iter().enumerate() {
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if !placed.contains(key) {
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projection.push(render_new_value(&set_items[index]));
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}
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}
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projection.join(", ")
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}
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_ => {
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if append_items.is_empty() {
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"*".to_string()
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} else {
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format!("*, {}", append_items.join(", "))
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}
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}
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}
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} else if append_items.is_empty() {
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"*".to_string()
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} else {
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format!("*, {}", append_items.join(", "))
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};
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let mut sql = format!("SELECT {select_items} FROM {from_sql}");
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if let Some(selection) = &update.selection {
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sql.push_str(&format!(" WHERE {selection}"));
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}
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if !update.order_by.is_empty() {
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let order_by = update.order_by.iter().map(|item| item.to_string()).collect::<Vec<_>>().join(", ");
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sql.push_str(&format!(" ORDER BY {order_by}"));
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}
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if let Some(limit) = &update.limit {
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sql.push_str(&format!(" LIMIT {limit}"));
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}
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Ok(sql)
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}
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/// INSERT … VALUES → SELECT 值行 UNION ALL …（列名来自插入列，直观展示即将插入的行）。
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fn build_insert_preview(
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insert: &sqlparser::ast::Insert,
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dialect_key: &str,
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quote: Option<&str>,
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) -> Result<String, String> {
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// MySQL `INSERT INTO t SET a=1, b=2`
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if !insert.assignments.is_empty() {
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let items: Vec<String> = insert
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.assignments
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.iter()
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.map(|assignment| {
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let col = assignment_target_column(&assignment.target)
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.ok_or_else(|| unsupported("INSERT ... SET assignment target is not a single column"))?;
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Ok(format!("{} AS {}", assignment.value, quote_identifier(&col.value, quote, dialect_key)))
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})
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.collect::<Result<Vec<_>, String>>()?;
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if items.is_empty() {
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return Err(unsupported("INSERT ... SET has no assignments"));
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}
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return Ok(format!("SELECT {}", items.join(", ")));
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}
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let Some(source) = &insert.source else {
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return Err(unsupported("INSERT has no source"));
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};
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match source.body.as_ref() {
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SetExpr::Values(values) => {
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let column_names: Vec<String> = insert
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.columns
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.iter()
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.filter_map(|column| {
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column.0.last().and_then(ObjectNamePart::as_ident).map(|ident| ident.value.clone())
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})
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.collect();
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if !column_names.is_empty() && values.rows.iter().any(|row| row.content.len() != column_names.len()) {
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return Err(unsupported("INSERT VALUES row length does not match the column list"));
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}
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let render_row = |row_exprs: &[Expr]| -> String {
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let cells: Vec<String> = row_exprs
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.iter()
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.enumerate()
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.map(|(index, expr)| {
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let expr_text = expr.to_string();
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if column_names.is_empty() {
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expr_text
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} else {
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format!("{expr_text} AS {}", quote_identifier(&column_names[index], quote, dialect_key))
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}
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})
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.collect();
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format!("SELECT {}", cells.join(", "))
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};
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let rows = values.rows.iter().collect::<Vec<_>>();
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let Some(first) = rows.first() else {
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return Err(unsupported("INSERT VALUES is empty"));
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};
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let mut sql = render_row(&first.content);
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for row in rows.iter().skip(1) {
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sql.push_str(" UNION ALL ");
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sql.push_str(&render_row(&row.content));
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}
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Ok(sql)
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}
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_ => {
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// INSERT … SELECT：预览 = 源查询（即将会插入的行）。
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Ok(source.to_string())
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}
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}
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}
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/// DELETE → SELECT * FROM … WHERE …（标明将删除的行；无「新值」列）。
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fn build_delete_preview(
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delete: &sqlparser::ast::Delete,
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_dialect_key: &str,
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_quote: Option<&str>,
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) -> Result<String, String> {
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let from_sql = match &delete.from {
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sqlparser::ast::FromTable::WithFromKeyword(tables) | sqlparser::ast::FromTable::WithoutKeyword(tables) => {
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tables.iter().map(|table: &TableWithJoins| table.to_string()).collect::<Vec<_>>().join(", ")
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}
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};
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if from_sql.is_empty() {
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return Err(unsupported("DELETE has no FROM"));
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}
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let mut sql = format!("SELECT * FROM {from_sql}");
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if let Some(using) = &delete.using {
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if !using.is_empty() {
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let using_sql = using.iter().map(|table| table.to_string()).collect::<Vec<_>>().join(", ");
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sql.push_str(&format!(", {using_sql}"));
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}
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}
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if let Some(selection) = &delete.selection {
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sql.push_str(&format!(" WHERE {selection}"));
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}
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if !delete.order_by.is_empty() {
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let order_by = delete.order_by.iter().map(|item| item.to_string()).collect::<Vec<_>>().join(", ");
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sql.push_str(&format!(" ORDER BY {order_by}"));
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}
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if let Some(limit) = &delete.limit {
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sql.push_str(&format!(" LIMIT {limit}"));
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}
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Ok(sql)
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}
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pub fn build_dml_change_preview_sql(options: DmlChangePreviewSqlOptions) -> Result<DmlChangePreviewSqlResult, String> {
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let dialect_key = normalize_dialect(options.database_type.as_deref());
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let statements = parse_statements(&options.sql, dialect_key)?;
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let statement = match statements.len() {
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0 => return Err(unsupported("no statement to preview")),
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1 => &statements[0],
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_ => return Err(unsupported("only one statement can be previewed at a time")),
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};
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let quote = options.identifier_quote.as_deref();
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let columns = options.columns.as_deref();
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match statement {
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Statement::Update(update) => Ok(DmlChangePreviewSqlResult {
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sql: build_update_preview(update, dialect_key, quote, columns)?,
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operation: "update".to_string(),
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has_new_value_columns: true,
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tables: vec![update_primary_table_ref(update)],
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}),
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Statement::Insert(insert) => Ok(DmlChangePreviewSqlResult {
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sql: build_insert_preview(insert, dialect_key, quote)?,
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operation: "insert".to_string(),
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has_new_value_columns: true,
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tables: vec![insert_table_ref(insert)],
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}),
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Statement::Delete(delete) => Ok(DmlChangePreviewSqlResult {
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sql: build_delete_preview(delete, dialect_key, quote)?,
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operation: "delete".to_string(),
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has_new_value_columns: false,
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tables: vec![delete_table_ref(delete)],
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}),
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_ => Err(unsupported("only UPDATE / INSERT / DELETE statements can be previewed")),
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}
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}
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fn object_name_table_ref(name: &sqlparser::ast::ObjectName) -> DmlChangePreviewTableRef {
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let names: Vec<String> =
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name.0.iter().filter_map(|part| part.as_ident().map(|ident| ident.value.clone())).collect();
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match names.len() {
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4 => DmlChangePreviewTableRef {
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catalog: Some(names[0].clone()),
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database: Some(names[1].clone()),
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schema: Some(names[2].clone()),
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table: Some(names[3].clone()),
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},
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3 => DmlChangePreviewTableRef {
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catalog: None,
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database: Some(names[0].clone()),
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schema: Some(names[1].clone()),
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table: Some(names[2].clone()),
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},
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2 => DmlChangePreviewTableRef {
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catalog: None,
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database: None,
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schema: Some(names[0].clone()),
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table: Some(names[1].clone()),
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},
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1 => DmlChangePreviewTableRef { catalog: None, database: None, schema: None, table: names.into_iter().next() },
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_ => DmlChangePreviewTableRef { catalog: None, database: None, schema: None, table: None },
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}
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}
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fn update_primary_table_ref(update: &sqlparser::ast::Update) -> DmlChangePreviewTableRef {
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match &update.table.relation {
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sqlparser::ast::TableFactor::Table { name, .. } => object_name_table_ref(name),
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_ => DmlChangePreviewTableRef { catalog: None, database: None, schema: None, table: None },
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}
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}
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fn insert_table_ref(insert: &sqlparser::ast::Insert) -> DmlChangePreviewTableRef {
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match &insert.table {
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sqlparser::ast::TableObject::TableName(name) => object_name_table_ref(name),
|
||||
_ => DmlChangePreviewTableRef { catalog: None, database: None, schema: None, table: None },
|
||||
}
|
||||
}
|
||||
|
||||
fn delete_table_ref(delete: &sqlparser::ast::Delete) -> DmlChangePreviewTableRef {
|
||||
if let Some(first) = delete.tables.first() {
|
||||
return object_name_table_ref(first);
|
||||
}
|
||||
let tables = match &delete.from {
|
||||
sqlparser::ast::FromTable::WithFromKeyword(tables) | sqlparser::ast::FromTable::WithoutKeyword(tables) => {
|
||||
tables
|
||||
}
|
||||
};
|
||||
match tables.first().and_then(|table| match &table.relation {
|
||||
sqlparser::ast::TableFactor::Table { name, .. } => Some(name),
|
||||
_ => None,
|
||||
}) {
|
||||
Some(name) => object_name_table_ref(name),
|
||||
None => DmlChangePreviewTableRef { catalog: None, database: None, schema: None, table: None },
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
fn preview(sql: &str, database_type: &str) -> Result<DmlChangePreviewSqlResult, String> {
|
||||
build_dml_change_preview_sql(DmlChangePreviewSqlOptions {
|
||||
sql: sql.to_string(),
|
||||
database_type: Some(database_type.to_string()),
|
||||
identifier_quote: None,
|
||||
columns: None,
|
||||
})
|
||||
}
|
||||
|
||||
fn preview_with_columns(
|
||||
sql: &str,
|
||||
database_type: &str,
|
||||
columns: Vec<String>,
|
||||
) -> Result<DmlChangePreviewSqlResult, String> {
|
||||
build_dml_change_preview_sql(DmlChangePreviewSqlOptions {
|
||||
sql: sql.to_string(),
|
||||
database_type: Some(database_type.to_string()),
|
||||
identifier_quote: None,
|
||||
columns: Some(columns),
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_simple_single_table() {
|
||||
let result = preview("UPDATE admin_sessions SET public_id = 123 WHERE id = 1", "mysql").unwrap();
|
||||
assert_eq!(result.operation, "update");
|
||||
assert_eq!(result.sql, "SELECT *, 123 AS `public_id (new)` FROM admin_sessions WHERE id = 1");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_multiple_assignments_and_expression() {
|
||||
let result = preview("UPDATE t SET a = 1, b = a + 1", "postgres").unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, 1 AS \"a (new)\", a + 1 AS \"b (new)\" FROM t");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_deduplicates_same_column_last_wins() {
|
||||
let result = preview("UPDATE t SET x = 1, x = 2", "postgres").unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, 2 AS \"x (new)\" FROM t");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_with_alias_and_join() {
|
||||
let result = preview("UPDATE a JOIN b ON a.id = b.id SET a.x = b.x WHERE a.id = 1", "mysql").unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, b.x AS `x (new)` FROM a JOIN b ON a.id = b.id WHERE a.id = 1");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_postgres_from_clause_rejected() {
|
||||
// `UPDATE … FROM …` 的目标行可能匹配多行来源，跨连接改写会重复计数，应拒绝预览。
|
||||
let error = preview("UPDATE t SET x = s.y FROM s WHERE t.id = s.id", "postgres").unwrap_err();
|
||||
assert_eq!(error, "Preview is not supported: UPDATE ... FROM");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_where_missing() {
|
||||
let result = preview("UPDATE t SET x = 1", "sqlite").unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, 1 AS \"x (new)\" FROM t");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn insert_values_with_columns() {
|
||||
let result = preview("INSERT INTO t (a, b) VALUES (1, 'x'), (2, 'y')", "postgres").unwrap();
|
||||
assert_eq!(result.sql, "SELECT 1 AS \"a\", 'x' AS \"b\" UNION ALL SELECT 2 AS \"a\", 'y' AS \"b\"");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn insert_select_source() {
|
||||
let result = preview("INSERT INTO t SELECT id, name FROM src WHERE active", "postgres").unwrap();
|
||||
assert_eq!(result.sql, "SELECT id, name FROM src WHERE active");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn insert_set_mysql() {
|
||||
let result = preview("INSERT INTO t SET a = 1, b = 'x'", "mysql").unwrap();
|
||||
assert_eq!(result.sql, "SELECT 1 AS `a`, 'x' AS `b`");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn delete_simple() {
|
||||
let result = preview("DELETE FROM t WHERE id = 1", "postgres").unwrap();
|
||||
assert_eq!(result.operation, "delete");
|
||||
assert_eq!(result.sql, "SELECT * FROM t WHERE id = 1");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn delete_mysql_multi_table() {
|
||||
let result = preview("DELETE d FROM d JOIN logs l ON d.id = l.id WHERE l.ts < '2020-01-01'", "mysql").unwrap();
|
||||
assert_eq!(result.sql, "SELECT * FROM d JOIN logs l ON d.id = l.id WHERE l.ts < '2020-01-01'");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn rejects_multiple_statements() {
|
||||
assert!(preview("UPDATE t SET a = 1; UPDATE t2 SET b = 2", "postgres").is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn rejects_non_dml() {
|
||||
assert!(preview("SELECT * FROM t", "postgres").is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn respects_identifier_quote() {
|
||||
let result = build_dml_change_preview_sql(DmlChangePreviewSqlOptions {
|
||||
sql: "UPDATE t SET a = 1 WHERE id = 1".to_string(),
|
||||
database_type: Some("postgres".to_string()),
|
||||
identifier_quote: Some("\"".to_string()),
|
||||
columns: None,
|
||||
})
|
||||
.unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, 1 AS \"a (new)\" FROM t WHERE id = 1");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_sqlserver_bracket_quote() {
|
||||
let result = build_dml_change_preview_sql(DmlChangePreviewSqlOptions {
|
||||
sql: "UPDATE dbo.t SET a = 1 WHERE id = 1".to_string(),
|
||||
database_type: Some("sqlserver".to_string()),
|
||||
identifier_quote: Some("[".to_string()),
|
||||
columns: None,
|
||||
})
|
||||
.unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, 1 AS [a (new)] FROM dbo.t WHERE id = 1");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_interleaves_new_value_after_its_original_column() {
|
||||
let result = preview_with_columns(
|
||||
"UPDATE admin_sessions SET public_id = 123 WHERE id = 1",
|
||||
"mysql",
|
||||
vec!["id".to_string(), "public_id".to_string(), "session".to_string()],
|
||||
)
|
||||
.unwrap();
|
||||
assert_eq!(
|
||||
result.sql,
|
||||
"SELECT `id`, `public_id`, 123 AS `public_id (new)`, `session` FROM admin_sessions WHERE id = 1"
|
||||
);
|
||||
assert_eq!(result.tables.len(), 1);
|
||||
assert_eq!(result.tables[0].table.as_deref(), Some("admin_sessions"));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_interleave_multiple_assignments_keeps_order() {
|
||||
let result = preview_with_columns(
|
||||
"UPDATE t SET b = 2, a = 1",
|
||||
"postgres",
|
||||
vec!["a".to_string(), "b".to_string(), "c".to_string()],
|
||||
)
|
||||
.unwrap();
|
||||
assert_eq!(result.sql, "SELECT \"a\", 1 AS \"a (new)\", \"b\", 2 AS \"b (new)\", \"c\" FROM t");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_interleave_missing_set_column_appends_at_end() {
|
||||
let result =
|
||||
preview_with_columns("UPDATE t SET z = 9", "postgres", vec!["a".to_string(), "b".to_string()]).unwrap();
|
||||
assert_eq!(result.sql, "SELECT \"a\", \"b\", 9 AS \"z (new)\" FROM t");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn update_multi_table_ignores_columns_for_append_mode() {
|
||||
let result = preview_with_columns(
|
||||
"UPDATE a JOIN b ON a.id = b.id SET a.x = b.x WHERE a.id = 1",
|
||||
"mysql",
|
||||
vec!["a_x".to_string()],
|
||||
)
|
||||
.unwrap();
|
||||
assert_eq!(result.sql, "SELECT *, b.x AS `x (new)` FROM a JOIN b ON a.id = b.id WHERE a.id = 1");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn table_refs_extracted_for_dml() {
|
||||
let update = preview("UPDATE db.public.t SET a = 1", "postgres").unwrap();
|
||||
assert_eq!(update.tables.len(), 1);
|
||||
assert_eq!(update.tables[0].database.as_deref(), Some("db"));
|
||||
assert_eq!(update.tables[0].schema.as_deref(), Some("public"));
|
||||
assert_eq!(update.tables[0].table.as_deref(), Some("t"));
|
||||
|
||||
let insert = preview("INSERT INTO orders (id) VALUES (1)", "postgres").unwrap();
|
||||
assert_eq!(insert.tables[0].table.as_deref(), Some("orders"));
|
||||
|
||||
let delete = preview("DELETE FROM t WHERE id = 1", "postgres").unwrap();
|
||||
assert_eq!(delete.tables[0].table.as_deref(), Some("t"));
|
||||
}
|
||||
}
|
||||
@@ -43,6 +43,7 @@ pub mod database_search_sql;
|
||||
pub mod db;
|
||||
pub mod db_admin_sql;
|
||||
pub mod dml_binding;
|
||||
pub mod dml_preview_sql;
|
||||
pub mod docs;
|
||||
pub mod document_ops;
|
||||
pub mod driver_runtime;
|
||||
|
||||
Reference in new issue
Block a user